Esias 37:6

6 And Esaias said to them, Thus shall ye say to your master, Thus saith the Lord, Be not thou afraid at the words which thou hast heard, wherewith the ambassadors of the king of the Assyrians have reproached me,

Esias 37:6 In-Context

4 May the Lord thy God hear the words of Rabsaces, which the king of the Assyrians has sent, to reproach the living God, even to reproach with the words which the Lord thy God has heard: therefore thou shalt pray to thy Lord for these that are left.
5 So the servants of king Ezekias came to Esaias.
6 And Esaias said to them, Thus shall ye say to your master, Thus saith the Lord, Be not thou afraid at the words which thou hast heard, wherewith the ambassadors of the king of the Assyrians have reproached me,
7 Behold, I send a blast upon him, and he shall hear a report, and return to his own country, and he shall fall by the sword in his own land.
8 So Rabsaces returned, and found the king of the Assyrians besieging Lobna: for he had heard that he had departed from Lachis.

The Brenton translation of the Septuagint is in the public domain.